Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d1b7710055c39443cd3b0e141078fae899b1553c580d98ff4dc54ad543b7028' 
  AND token = 'RDc2CsRvimemIwOo+PgCtdoe3oM1XYYh8BUQFlGoaAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}